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Go Back   SailNet Community > Skills and Seamanship > Learning to Sail > roller plotter or parallel rulers?
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Thread: roller plotter or parallel rulers? Reply to Thread
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Topic Review (Newest First)
11-06-2012 04:28 PM
carl762
Re: roller plotter or parallel rulers?

Quote:
This stuff from Westview looks good.
Thanks.
11-01-2012 05:39 AM
groggy
Re: roller plotter or parallel rulers?

Quote:
Originally Posted by hellosailor View Post
groggy, nav tools are like screwdrivers: You have a favorite for any particular use, even if another one can do the same job. You really need to try out both tools to see which will suit you better, the same way that some folks can't stand mechanical pencils and some folks can't stand pencil sharpeners.

There used to be an inexpensive "Rolling Ruler" sold in the craft and hobby stores, stationery stores, and I think even Martha Stewart's scrapbooking line has something similar. So check the local craft stores, you may be able to get something under ten bucks that is plenty good enough for practicing with. Then if you want the better one...you leave one at home, one on the boat, it isn't a total waste to have two tools for this job.
yknow, that seems right. i like the idea of parallel rulers, but when i was trying to use them underway in 30kts, it was pointless. overall, i have settled on the portland plotter, partially because i of the ability to adjust in variation, and partially because i can mostly eyeball the vertical lines to the nearest longitude line even if it isn't lined up already, which it often is, without having to move it. it's a great tool.

i am learning to use whatever is at hand, especially as they are all kind of conceptually similar, but if i have to choose one tool to bring with me, it's going to be the portland plotter. and for aprox $20 it's an easy thing to toss into my sailing bag without too much cost or space or weight.

Mostly i use line of sight as i sail in a bay and can mostly just look and see where i want to go, other than checking on the chart for obstacles, and failing that, navionics with a glance at the charts... but I do like to plot on paper for fun.
11-01-2012 12:43 AM
jackdale
Re: roller plotter or parallel rulers?

Quote:
Originally Posted by carl762 View Post
Thanks Jack for the Video. Please send post a link to where I can see part II?

I have one of those, as well as parallel ruler. Need to really learn this stuff.
Not sure if Mike has posted Part II. You might contact him.

This stuff from Westview looks good.

10-31-2012 11:51 PM
hellosailor
Re: roller plotter or parallel rulers?

groggy, nav tools are like screwdrivers: You have a favorite for any particular use, even if another one can do the same job. You really need to try out both tools to see which will suit you better, the same way that some folks can't stand mechanical pencils and some folks can't stand pencil sharpeners.

There used to be an inexpensive "Rolling Ruler" sold in the craft and hobby stores, stationery stores, and I think even Martha Stewart's scrapbooking line has something similar. So check the local craft stores, you may be able to get something under ten bucks that is plenty good enough for practicing with. Then if you want the better one...you leave one at home, one on the boat, it isn't a total waste to have two tools for this job.
10-31-2012 09:25 PM
carl762
Re: roller plotter or parallel rulers?

Thanks Jack for the Video. Please send post a link to where I can see part II?

I have one of those, as well as parallel ruler. Need to really learn this stuff.
10-29-2012 10:50 AM
jackdale
Re: roller plotter or parallel rulers?

Quote:
Originally Posted by Halcyon yachts View Post
I use a Portland Plotter which I personally think are most suitable for smaller boats.

Pete
Why smaller boats? I use mine on bigger boats as well.
10-29-2012 06:54 AM
Halcyon1
Re: roller plotter or parallel rulers?

I use a Portland Plotter which I personally think are most suitable for smaller boats.

Pete
10-19-2012 12:43 PM
nmejicano
Re: roller plotter or parallel rulers?

The problem with both rolling plotters and parallel rules is that in a moving boat, they tend to slide. A minor slide and you screw up your plotting. My solution (not patented yet) is to use a rolling plotter, I use an inexpensive Weems & Plath. They have two small grooves between the rollers. Go to Home Depot, and buy the smallest o ring that will fit snuggle in those grooves. Now you have a roller that stick to the chart. Good luck
09-26-2012 05:00 PM
jackdale
Re: roller plotter or parallel rulers?

Quote:
Originally Posted by Hudsonian View Post
I find the Davis One Arm Protractor easiest to use-- particularly, when at the helm I'm working with a chartbook in my lap. Parallel rulers, roller plotter, and a pair of triangles all require a flat surface.
and ideally charts without any creases or folds.

I have a Davis plotter as well. I like the sturdy construction of the Portland plotter and the ability of account for variation. I have some instructions that show how to account for deviation as well, but since none of the boats I sail have deviation cards, I have not tried out that feature.

The parallel rule is nice for doing a faster advanced LOP. But I am almost as fast with the Portland.

My next best "plotter" is the Douglas protractor. Not mentioned yet.

09-26-2012 02:21 PM
Hudsonian
Re: roller plotter or parallel rulers?

I find the Davis One Arm Protractor easiest to use-- particularly, when at the helm I'm working with a chartbook in my lap. Parallel rulers, roller plotter, and a pair of triangles all require a flat surface.
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